Pre-clinical evaluation of titanium nitride coated titanium material

Area of Science:

• Biomaterials Science
• Medical Device Engineering
• Toxicology

Background:

• Titanium nitride (TiN) coated titanium is a candidate material for left ventricular assist devices (LVADs).
• Pre-clinical evaluation according to international standards is crucial before fabricating medical devices.
• Assessing the biocompatibility and toxicity of TiN coated titanium is essential for its safe application in LVADs.

Purpose of the Study:

• To evaluate the biocompatibility and toxicity of titanium nitride coated titanium.
• To determine if the material meets international standards for medical device fabrication.
• To assess potential risks including acute systemic toxicity, irritation, hemolysis, and tissue response.

Main Methods:

• Acute systemic toxicity tests using physiological saline and cottonseed oil extracts in mice.
• Intracutaneous irritation tests in rabbits with material extracts.
• In vitro hemolysis assays using rabbit blood.
• Muscle implantation studies in rabbits followed by histopathological analysis at 1, 4, and 12 weeks.

Main Results:

• No significant systemic toxicity or irritation was observed with material extracts.
• Hemolysis percentages were within acceptable ranges, indicating minimal impact on red blood cells.
• Histopathological analysis revealed no adverse cellular changes at the implantation sites.

Conclusions:

• Titanium nitride coated titanium demonstrates favorable biocompatibility.
• The material is non-toxic, non-irritant, and non-haemolytic.
• The findings support the use of TiN coated titanium for left ventricular assist device fabrication.